/Engine/Source/Runtime/GeometryCore/Public/DynamicMesh/DynamicMeshOctree3.h
Call TriangleFunc on any triangles in the branch of the tree starting at CellRef
void CollectTriangles ( const [FCellReference](API\Runtime\GeometryCore\DynamicMesh\FDynamicMeshOctree3\FCellReference) & CellRef, [TFunctionRef](API\Runtime\Core\GenericPlatform\TFunctionRef)< void(int)> TriangleFunc ) const